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Use "costuming" in a sentence
"Function was also important in costuming Zoë Saldana as Aisha, in clothes that Guidasci describes as simple and athletic."
"That a great many of them were in costume and weren't paid to be so impressed me as well, as I think we are now firmly in the post cosplay age where costuming is mainstream."
"Skiffytown and friends will help you with their trials and tribulations in costuming your own character or one you really like."